A Survey for Aseismic Ability Criteria of Wooden Structures based on Earthquake Disaster Distribution

地震危险风险的估计应基于经验数据和实验数据给出的正确的地震活动。在日本，一千多年来，许多文献都记载了历史上的地震灾害。日本气象厅还按月公布了其他实验地震记录，这些记录是日本境内或附近地震活动的重要基础数据。数据库系统建立在普通个人计算机上，数据可以从其他任意站点调用。1995年日本南部地震和2000年日本西武大地震中，大量木屋遭受严重破坏。通过对中部地区日野、Yonago和Niimi三个区的Awaji岛或日野、Yonago和Niimi镇三个区倒塌或损坏的木屋的全面调查，从7类结构特征的角度对木屋的损坏指标进行了评估，并将抗震性能标准作为木结构的损坏指标。损伤指数的影响因素是木结构的类别，如结构的类型和尺寸、层数、用途、方案等，有效地评价了这些因素对木结构损伤指数的贡献。

The estimation of earthquake hazard risk should be based upon the correct earthquake activities given from both empirical and experimental data. In Japan, historical earthquake hazards were recorded on many documents for more than a thousand year. Other experimental earthquake records were published from the Japan Meteololgic Agency by monthly, and these records are important basic data for earthquake activities in or near Japan. Database system is composed on the normal personal computer and the data can be used from another arbitrary station.A great number of wooden houses suffered from severe damage by Hyogoken Nanbu Earthquake 1 995 or by receent Tottoriken Seibu Earthquake 2000.>From the total investigation of collapsed or damaged wooden houses in three districts in Awaji island or Towns of Hino, Yonago and Niimi in Chugoku District, damage indices of wooden houses are evaluated in the terms of seven categories of there structural characteristics.Asseismic ability criteria is evaluated as a damage index of wooden structues. The factors of the damage index are categries of wooden structres, such as type and dimensions of structure, numbers of story, usage, plan and etc. The contribution of these factors to damage index of wooden structure is efficiently evaluated.